VI.KT.G6.02 © Danfoss | 2016.05 | 19
Maintenance
Example
The return limit is active below 50 °C.
The influence is set to -3.0.
The actual return temperature is 2 degrees too low.
Result:
The desired flow temperature is changed by -3.0 x 2 = -6.0 degrees.
Normally, the setting in line 4036 is 0 in district heating systems because a lower return
temperature is acceptable.
Typically, the setting in line 4036 is higher than 0 in boiler systems to avoid a too low return
temperature (see also line 4035).
If the return temperature measurement is used as thermometer function only, the settings
in lines 4035 and 4036 should be 0.0.
Intgr. time (time constant for return temp. limitation)
4037
Setting range
Factory setting
OFF / 1 ... 50 s
25 s
Controls how fast the return temperature adapts to the desired return temperature (I control).
OFF: The control function is not influenced by the ‘Intgr. time’.
1:
The desired temperature is adapted quickly.
50:
The desired temperature is adapted slowly.
Priority (priority for return temp. limitation)
4085
Setting range
Factory setting
ON / OFF
OFF
Choose whether the return temperature limitation should overrule the set min. flow temperature
‘Temp. min.’ (line 2177).
ON:
The min. flow temperature limit is overruled.
OFF: The min. flow temperature limit is not overruled.
